1 // RUN: %clang_cc1 -w -triple x86_64-elf-gnu -emit-llvm -o - %s -std=c++11 | FileCheck %s 2 3 // FIXME: The padding in all these objects should be zero-initialized. 4 namespace StructUnion { 5 struct A { 6 int n; 7 double d; 8 union U { 9 constexpr U(int x) : x(x) {} 10 constexpr U(const char *y) : y(y) {} 11 int x; 12 const char *y; 13 } u; 14 15 constexpr A(int n, double d, int x) : n(n), d(d), u(x) {} 16 constexpr A(int n, double d, const char *y) : n(n), d(d), u(y) {} 17 }; 18 19 // CHECK: @_ZN11StructUnion1aE = constant {{.*}} { i32 1, double 2.000000e+00, {{.*}} { i32 3, [4 x i8] undef } } 20 extern constexpr A a(1, 2.0, 3); 21 22 // CHECK: @_ZN11StructUnion1bE = constant {{.*}} { i32 4, double 5.000000e+00, {{.*}} { i8* getelementptr inbounds ([6 x i8], [6 x i8]* @{{.*}}, i32 0, i32 0) } } 23 extern constexpr A b(4, 5, "hello"); 24 25 struct B { 26 int n; 27 }; 28 29 // CHECK: @_ZN11StructUnion1cE = global {{.*}} zeroinitializer 30 // CHECK: @_ZN11StructUnion2c2E = global {{.*}} zeroinitializer 31 B c; 32 B c2 = B(); 33 34 // CHECK: @_ZN11StructUnion1dE = global {{.*}} zeroinitializer 35 B d[10]; 36 37 struct C { 38 constexpr C() : c(0) {} 39 int c; 40 }; 41 42 // CHECK: @_ZN11StructUnion1eE = global {{.*}} zeroinitializer 43 C e[10]; 44 45 struct D { 46 constexpr D() : d(5) {} 47 int d; 48 }; 49 50 // CHECK: @_ZN11StructUnion1fE = global {{.*}} { i32 5 } 51 D f; 52 53 union E { 54 int a; 55 void *b = &f; 56 }; 57 58 // CHECK: @_ZN11StructUnion1gE = global {{.*}} @_ZN11StructUnion1fE 59 E g; 60 61 // CHECK: @_ZN11StructUnion1hE = global {{.*}} @_ZN11StructUnion1fE 62 E h = E(); 63 } 64 65 namespace BaseClass { 66 template<typename T, unsigned> struct X : T {}; 67 struct C { char c = 1; }; 68 template<unsigned... Ns> struct Cs : X<C,Ns>... {}; 69 struct N { int n = 3; }; 70 struct D { double d = 4.0; }; 71 72 template<typename ...Ts> 73 struct Test : Ts... { constexpr Test() : Ts()..., n(5) {} int n; }; 74 75 using Test1 = Test<N, C, Cs<1,2>, D, X<C,1>>; 76 // CHECK: @_ZN9BaseClass2t1E = constant {{.*}} { i32 3, i8 1, i8 1, i8 1, double 4.000000e+00, i8 1, i32 5 }, align 8 77 extern constexpr Test1 t1 = Test1(); 78 79 struct DN : D, N {}; 80 struct DND : DN, X<D,0> {}; 81 struct DNN : DN, X<N,0> {}; 82 // CHECK: @_ZN9BaseClass3dndE = constant {{.*}} { double 4.000000e+00, i32 3, double 4.000000e+00 } 83 extern constexpr DND dnd = DND(); 84 // Note, N subobject is laid out in DN subobject's tail padding. 85 // CHECK: @_ZN9BaseClass3dnnE = constant {{.*}} { double 4.000000e+00, i32 3, i32 3 } 86 extern constexpr DNN dnn = DNN(); 87 88 struct E {}; 89 struct Test2 : X<E,0>, X<E,1>, X<E,2>, X<E,3> {}; 90 // CHECK: @_ZN9BaseClass2t2E = constant {{.*}} undef 91 extern constexpr Test2 t2 = Test2(); 92 93 struct __attribute((packed)) PackedD { double y = 2; }; 94 struct Test3 : C, PackedD { constexpr Test3() {} }; 95 // CHECK: @_ZN9BaseClass2t3E = constant <{ i8, double }> <{ i8 1, double 2.000000e+00 }> 96 extern constexpr Test3 t3 = Test3(); 97 } 98 99 namespace Array { 100 // CHECK: @_ZN5Array3arrE = constant [2 x i32] [i32 4, i32 0] 101 extern constexpr int arr[2] = { 4 }; 102 103 // CHECK: @_ZN5Array1cE = constant [6 x [4 x i8]] [{{.*}} c"foo\00", [4 x i8] c"a\00\00\00", [4 x i8] c"bar\00", [4 x i8] c"xyz\00", [4 x i8] c"b\00\00\00", [4 x i8] c"123\00"] 104 extern constexpr char c[6][4] = { "foo", "a", { "bar" }, { 'x', 'y', 'z' }, { "b" }, '1', '2', '3' }; 105 106 // CHECK: @_ZN5Array2ucE = constant [4 x i8] c"foo\00" 107 extern constexpr unsigned char uc[] = { "foo" }; 108 109 struct C { constexpr C() : n(5) {} int n, m = 3 * n + 1; }; 110 // CHECK: @_ZN5Array5ctorsE = constant [3 x {{.*}}] [{{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }, {{.*}} { i32 5, i32 16 }] 111 extern const C ctors[3]; 112 constexpr C ctors[3]; 113 114 // CHECK: @_ZN5Array1dE = constant {{.*}} { [2 x i32] [i32 1, i32 2], [3 x i32] [i32 3, i32 4, i32 5] } 115 struct D { int n[2]; int m[3]; } extern constexpr d = { 1, 2, 3, 4, 5 }; 116 117 struct E { 118 char c[4]; 119 char d[4]; 120 constexpr E() : c("foo"), d("x") {} 121 }; 122 // CHECK: @_ZN5Array1eE = constant {{.*}} { [4 x i8] c"foo\00", [4 x i8] c"x\00\00\00" } 123 extern constexpr E e = E(); 124 125 // PR13290 126 struct F { constexpr F() : n(4) {} int n; }; 127 // CHECK: @_ZN5Array2f1E = global {{.*}} zeroinitializer 128 F f1[1][1][0] = { }; 129 // CHECK: @_ZN5Array2f2E = global {{.* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4 .* i32 4}} 130 F f2[2][2][2] = { }; 131 } 132 133 namespace MemberPtr { 134 struct B1 { 135 int a, b; 136 virtual void f(); 137 void g(); 138 }; 139 struct B2 { 140 int c, d; 141 virtual void h(); 142 void i(); 143 }; 144 struct C : B1 { 145 int e; 146 virtual void j(); 147 void k(); 148 }; 149 struct D : C, B2 { 150 int z; 151 virtual void l(); 152 void m(); 153 }; 154 155 // CHECK: @_ZN9MemberPtr2daE = constant i64 8 156 // CHECK: @_ZN9MemberPtr2dbE = constant i64 12 157 // CHECK: @_ZN9MemberPtr2dcE = constant i64 32 158 // CHECK: @_ZN9MemberPtr2ddE = constant i64 36 159 // CHECK: @_ZN9MemberPtr2deE = constant i64 16 160 // CHECK: @_ZN9MemberPtr2dzE = constant i64 40 161 extern constexpr int (D::*da) = &B1::a; 162 extern constexpr int (D::*db) = &C::b; 163 extern constexpr int (D::*dc) = &B2::c; 164 extern constexpr int (D::*dd) = &D::d; 165 extern constexpr int (D::*de) = &C::e; 166 extern constexpr int (D::*dz) = &D::z; 167 168 // CHECK: @_ZN9MemberPtr2baE = constant i64 8 169 // CHECK: @_ZN9MemberPtr2bbE = constant i64 12 170 // CHECK: @_ZN9MemberPtr2bcE = constant i64 8 171 // CHECK: @_ZN9MemberPtr2bdE = constant i64 12 172 // CHECK: @_ZN9MemberPtr2beE = constant i64 16 173 // CHECK: @_ZN9MemberPtr3b1zE = constant i64 40 174 // CHECK: @_ZN9MemberPtr3b2zE = constant i64 16 175 extern constexpr int (B1::*ba) = (int(B1::*))&B1::a; 176 extern constexpr int (B1::*bb) = (int(B1::*))&C::b; 177 extern constexpr int (B2::*bc) = (int(B2::*))&B2::c; 178 extern constexpr int (B2::*bd) = (int(B2::*))&D::d; 179 extern constexpr int (B1::*be) = (int(B1::*))&C::e; 180 extern constexpr int (B1::*b1z) = (int(B1::*))&D::z; 181 extern constexpr int (B2::*b2z) = (int(B2::*))&D::z; 182 183 // CHECK: @_ZN9MemberPtr2dfE = constant {{.*}} { i64 1, i64 0 } 184 // CHECK: @_ZN9MemberPtr2dgE = constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 } 185 // CHECK: @_ZN9MemberPtr2dhE = constant {{.*}} { i64 1, i64 24 } 186 // CHECK: @_ZN9MemberPtr2diE = constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 24 } 187 // CHECK: @_ZN9MemberPtr2djE = constant {{.*}} { i64 9, i64 0 } 188 // CHECK: @_ZN9MemberPtr2dkE = constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 } 189 // CHECK: @_ZN9MemberPtr2dlE = constant {{.*}} { i64 17, i64 0 } 190 // CHECK: @_ZN9MemberPtr2dmE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 } 191 extern constexpr void (D::*df)() = &C::f; 192 extern constexpr void (D::*dg)() = &B1::g; 193 extern constexpr void (D::*dh)() = &B2::h; 194 extern constexpr void (D::*di)() = &D::i; 195 extern constexpr void (D::*dj)() = &C::j; 196 extern constexpr void (D::*dk)() = &C::k; 197 extern constexpr void (D::*dl)() = &D::l; 198 extern constexpr void (D::*dm)() = &D::m; 199 200 // CHECK: @_ZN9MemberPtr2bfE = constant {{.*}} { i64 1, i64 0 } 201 // CHECK: @_ZN9MemberPtr2bgE = constant {{.*}} { i64 {{.*}}2B11gEv{{.*}}, i64 0 } 202 // CHECK: @_ZN9MemberPtr2bhE = constant {{.*}} { i64 1, i64 0 } 203 // CHECK: @_ZN9MemberPtr2biE = constant {{.*}} { i64 {{.*}}2B21iEv{{.*}}, i64 0 } 204 // CHECK: @_ZN9MemberPtr2bjE = constant {{.*}} { i64 9, i64 0 } 205 // CHECK: @_ZN9MemberPtr2bkE = constant {{.*}} { i64 {{.*}}1C1kEv{{.*}}, i64 0 } 206 // CHECK: @_ZN9MemberPtr3b1lE = constant {{.*}} { i64 17, i64 0 } 207 // CHECK: @_ZN9MemberPtr3b1mE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 0 } 208 // CHECK: @_ZN9MemberPtr3b2lE = constant {{.*}} { i64 17, i64 -24 } 209 // CHECK: @_ZN9MemberPtr3b2mE = constant {{.*}} { i64 {{.*}}1D1mEv{{.*}}, i64 -24 } 210 extern constexpr void (B1::*bf)() = (void(B1::*)())&C::f; 211 extern constexpr void (B1::*bg)() = (void(B1::*)())&B1::g; 212 extern constexpr void (B2::*bh)() = (void(B2::*)())&B2::h; 213 extern constexpr void (B2::*bi)() = (void(B2::*)())&D::i; 214 extern constexpr void (B1::*bj)() = (void(B1::*)())&C::j; 215 extern constexpr void (B1::*bk)() = (void(B1::*)())&C::k; 216 extern constexpr void (B1::*b1l)() = (void(B1::*)())&D::l; 217 extern constexpr void (B1::*b1m)() = (void(B1::*)())&D::m; 218 extern constexpr void (B2::*b2l)() = (void(B2::*)())&D::l; 219 extern constexpr void (B2::*b2m)() = (void(B2::*)())&D::m; 220 } 221 222 namespace LiteralReference { 223 struct Lit { 224 constexpr Lit() : n(5) {} 225 int n; 226 }; 227 228 // This creates a non-const temporary and binds a reference to it. 229 // CHECK: @[[TEMP:.*]] = internal global {{.*}} { i32 5 }, align 4 230 // CHECK: @_ZN16LiteralReference3litE = constant {{.*}} @[[TEMP]], align 8 231 const Lit &lit = Lit(); 232 233 // This creates a const temporary as part of the reference initialization. 234 // CHECK: @[[TEMP:.*]] = internal constant {{.*}} { i32 5 }, align 4 235 // CHECK: @_ZN16LiteralReference4lit2E = constant {{.*}} @[[TEMP]], align 8 236 const Lit &lit2 = {}; 237 238 struct A { int &&r1; const int &&r2; }; 239 struct B { A &&a1; const A &&a2; }; 240 B b = { { 0, 1 }, { 2, 3 } }; 241 // CHECK: @[[TEMP0:.*]] = internal global i32 0, align 4 242 // CHECK: @[[TEMP1:.*]] = internal constant i32 1, align 4 243 // CHECK: @[[TEMPA1:.*]] = internal global {{.*}} { i32* @[[TEMP0]], i32* @[[TEMP1]] }, align 8 244 // CHECK: @[[TEMP2:.*]] = internal global i32 2, align 4 245 // CHECK: @[[TEMP3:.*]] = internal constant i32 3, align 4 246 // CHECK: @[[TEMPA2:.*]] = internal constant {{.*}} { i32* @[[TEMP2]], i32* @[[TEMP3]] }, align 8 247 // CHECK: @_ZN16LiteralReference1bE = global {{.*}} { {{.*}}* @[[TEMPA1]], {{.*}}* @[[TEMPA2]] }, align 8 248 249 struct Subobj { 250 int a, b, c; 251 }; 252 // CHECK: @[[TEMP:.*]] = internal global {{.*}} { i32 1, i32 2, i32 3 }, align 4 253 // CHECK: @_ZN16LiteralReference2soE = constant {{.*}} (i8* getelementptr {{.*}} @[[TEMP]]{{.*}}, i64 4) 254 constexpr int &&so = Subobj{ 1, 2, 3 }.b; 255 256 struct Dummy { int padding; }; 257 struct Derived : Dummy, Subobj { 258 constexpr Derived() : Dummy{200}, Subobj{4, 5, 6} {} 259 }; 260 using ConstDerived = const Derived; 261 // CHECK: @[[TEMPCOMMA:.*]] = internal constant {{.*}} { i32 200, i32 4, i32 5, i32 6 } 262 // CHECK: @_ZN16LiteralReference5commaE = constant {{.*}} getelementptr {{.*}} @[[TEMPCOMMA]]{{.*}}, i64 8) 263 constexpr const int &comma = (1, (2, ConstDerived{}).b); 264 265 // CHECK: @[[TEMPDERIVED:.*]] = internal global {{.*}} { i32 200, i32 4, i32 5, i32 6 } 266 // CHECK: @_ZN16LiteralReference4baseE = constant {{.*}} getelementptr {{.*}} @[[TEMPDERIVED]]{{.*}}, i64 4) 267 constexpr Subobj &&base = Derived{}; 268 269 // CHECK: @_ZN16LiteralReference7derivedE = constant {{.*}} @[[TEMPDERIVED]] 270 constexpr Derived &derived = static_cast<Derived&>(base); 271 } 272 273 namespace NonLiteralConstexpr { 274 constexpr int factorial(int n) { 275 return n ? factorial(n-1) * n : 1; 276 } 277 extern void f(int *p); 278 279 struct NonTrivialDtor { 280 constexpr NonTrivialDtor() : n(factorial(5)), p(&n) {} 281 ~NonTrivialDtor() { 282 f(p); 283 } 284 285 int n; 286 int *p; 287 }; 288 static_assert(!__is_literal(NonTrivialDtor), ""); 289 // CHECK: @_ZN19NonLiteralConstexpr3ntdE = global {{.*}} { i32 120, i32* getelementptr 290 NonTrivialDtor ntd; 291 292 struct VolatileMember { 293 constexpr VolatileMember() : n(5) {} 294 volatile int n; 295 }; 296 static_assert(!__is_literal(VolatileMember), ""); 297 // CHECK: @_ZN19NonLiteralConstexpr2vmE = global {{.*}} { i32 5 } 298 VolatileMember vm; 299 300 struct Both { 301 constexpr Both() : n(10) {} 302 ~Both(); 303 volatile int n; 304 }; 305 // CHECK: @_ZN19NonLiteralConstexpr1bE = global {{.*}} { i32 10 } 306 Both b; 307 308 void StaticVars() { 309 // CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE3ntd = {{.*}} { i32 120, i32* getelementptr {{.*}} 310 // CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE3ntd = 311 static NonTrivialDtor ntd; 312 // CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE2vm = {{.*}} { i32 5 } 313 // CHECK-NOT: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE2vm = 314 static VolatileMember vm; 315 // CHECK: @_ZZN19NonLiteralConstexpr10StaticVarsEvE1b = {{.*}} { i32 10 } 316 // CHECK: @_ZGVZN19NonLiteralConstexpr10StaticVarsEvE1b = 317 static Both b; 318 } 319 } 320 321 // PR12067 322 namespace VirtualMembers { 323 struct A { 324 constexpr A(double d) : d(d) {} 325 virtual void f(); 326 double d; 327 }; 328 struct B : A { 329 constexpr B() : A(2.0), c{'h', 'e', 'l', 'l', 'o'} {} 330 constexpr B(int n) : A(n), c{'w', 'o', 'r', 'l', 'd'} {} 331 virtual void g(); 332 char c[5]; 333 }; 334 struct C { 335 constexpr C() : n(64) {} 336 int n; 337 }; 338 struct D : C, A, B { 339 constexpr D() : A(1.0), B(), s(5) {} 340 short s; 341 }; 342 struct E : D, B { 343 constexpr E() : B(3), c{'b','y','e'} {} 344 char c[3]; 345 }; 346 // CHECK: @_ZN14VirtualMembers1eE = global { i8**, double, i32, i8**, double, [5 x i8], i16, i8**, double, [5 x i8], [3 x i8] } { i8** getelementptr inbounds ([11 x i8*], [11 x i8*]* @_ZTVN14VirtualMembers1EE, i32 0, i32 2), double 1.000000e+00, i32 64, i8** getelementptr inbounds ([11 x i8*], [11 x i8*]* @_ZTVN14VirtualMembers1EE, i32 0, i32 5), double 2.000000e+00, [5 x i8] c"hello", i16 5, i8** getelementptr inbounds ([11 x i8*], [11 x i8*]* @_ZTVN14VirtualMembers1EE, i32 0, i32 9), double 3.000000e+00, [5 x i8] c"world", [3 x i8] c"bye" } 347 E e; 348 349 struct nsMemoryImpl { 350 virtual void f(); 351 }; 352 // CHECK: @_ZN14VirtualMembersL13sGlobalMemoryE = internal global { i8** } { i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN14VirtualMembers12nsMemoryImplE, i32 0, i32 2) } 353 __attribute__((used)) 354 static nsMemoryImpl sGlobalMemory; 355 356 template<class T> 357 struct TemplateClass { 358 constexpr TemplateClass() : t{42} {} 359 virtual void templateMethod() {} 360 361 T t; 362 }; 363 // CHECK: @_ZN14VirtualMembers1tE = global { i8**, i32 } { i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN14VirtualMembers13TemplateClassIiEE, i32 0, i32 2), i32 42 } 364 TemplateClass<int> t; 365 } 366 367 namespace PR13273 { 368 struct U { 369 int t; 370 U() = default; 371 }; 372 373 struct S : U { 374 S() = default; 375 }; 376 377 // CHECK: @_ZN7PR132731sE = {{.*}} zeroinitializer 378 extern const S s {}; 379 } 380 381 namespace ArrayTemporary { 382 struct A { const int (&x)[3]; }; 383 struct B { const A (&x)[2]; }; 384 // CHECK: @[[A1:_ZGRN14ArrayTemporary1bE.*]] = internal constant [3 x i32] [i32 1, i32 2, i32 3] 385 // CHECK: @[[A2:_ZGRN14ArrayTemporary1bE.*]] = internal constant [3 x i32] [i32 4, i32 5, i32 6] 386 // CHECK: @[[ARR:_ZGRN14ArrayTemporary1bE.*]] = internal constant [2 x {{.*}}] [{{.*}} { [3 x i32]* @[[A1]] }, {{.*}} { [3 x i32]* @[[A2]] }] 387 // CHECK: @[[B:_ZGRN14ArrayTemporary1bE.*]] = internal global {{.*}} { [2 x {{.*}}]* @[[ARR]] } 388 // CHECK: @_ZN14ArrayTemporary1bE = constant {{.*}}* @[[B]] 389 B &&b = { { { { 1, 2, 3 } }, { { 4, 5, 6 } } } }; 390 } 391 392 namespace UnemittedTemporaryDecl { 393 constexpr int &&ref = 0; 394 extern constexpr int &ref2 = ref; 395 // CHECK: @_ZGRN22UnemittedTemporaryDecl3refE_ = internal global i32 0 396 397 // FIXME: This declaration should not be emitted -- it isn't odr-used. 398 // CHECK: @_ZN22UnemittedTemporaryDecl3refE 399 400 // CHECK: @_ZN22UnemittedTemporaryDecl4ref2E = constant i32* @_ZGRN22UnemittedTemporaryDecl3refE_ 401 } 402 403 // CHECK: @_ZZN12LocalVarInit3aggEvE1a = internal constant {{.*}} i32 101 404 // CHECK: @_ZZN12LocalVarInit4ctorEvE1a = internal constant {{.*}} i32 102 405 // CHECK: @_ZZN12LocalVarInit8mutable_EvE1a = private unnamed_addr constant {{.*}} i32 103 406 // CHECK: @_ZGRN33ClassTemplateWithStaticDataMember1SIvE1aE_ = linkonce_odr constant i32 5, comdat 407 // CHECK: @_ZN33ClassTemplateWithStaticDataMember3useE = constant i32* @_ZGRN33ClassTemplateWithStaticDataMember1SIvE1aE_ 408 // CHECK: @_ZGRN39ClassTemplateWithHiddenStaticDataMember1SIvE1aE_ = linkonce_odr hidden constant i32 5, comdat 409 // CHECK: @_ZN39ClassTemplateWithHiddenStaticDataMember3useE = constant i32* @_ZGRN39ClassTemplateWithHiddenStaticDataMember1SIvE1aE_ 410 // CHECK: @_ZGRZN20InlineStaticConstRef3funEvE1i_ = linkonce_odr constant i32 10, comdat 411 412 // Constant initialization tests go before this point, 413 // dynamic initialization tests go after. 414 415 // We must emit a constant initializer for NonLiteralConstexpr::ntd, but also 416 // emit an initializer to register its destructor. 417 // CHECK: define {{.*}}cxx_global_var_init{{.*}} 418 // CHECK-NOT: NonLiteralConstexpr 419 // CHECK: call {{.*}}cxa_atexit{{.*}} @_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev {{.*}} @_ZN19NonLiteralConstexpr3ntdE 420 // CHECK-NEXT: ret void 421 422 // We don't need to emit any dynamic initialization for NonLiteralConstexpr::vm. 423 // CHECK-NOT: NonLiteralConstexpr2vm 424 425 // We must emit a constant initializer for NonLiteralConstexpr::b, but also 426 // emit an initializer to register its destructor. 427 // CHECK: define {{.*}}cxx_global_var_init{{.*}} 428 // CHECK-NOT: NonLiteralConstexpr 429 // CHECK: call {{.*}}cxa_atexit{{.*}} @_ZN19NonLiteralConstexpr4BothD1Ev {{.*}} @_ZN19NonLiteralConstexpr1bE 430 // CHECK-NEXT: ret void 431 432 // CHECK: define {{.*}}NonLiteralConstexpr10StaticVars 433 // CHECK-NOT: } 434 // CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr14NonTrivialDtorD1Ev 435 // CHECK-NOT: } 436 // CHECK: call {{.*}}cxa_atexit{{.*}}@_ZN19NonLiteralConstexpr4BothD1Ev 437 438 // PR12848: Don't emit dynamic initializers for local constexpr variables. 439 namespace LocalVarInit { 440 constexpr int f(int n) { return n; } 441 struct Agg { int k; }; 442 struct Ctor { constexpr Ctor(int n) : k(n) {} int k; }; 443 struct Mutable { constexpr Mutable(int n) : k(n) {} mutable int k; }; 444 445 // CHECK: define {{.*}} @_ZN12LocalVarInit6scalarEv 446 // CHECK-NOT: call 447 // CHECK: store i32 100, 448 // CHECK-NOT: call 449 // CHECK: ret i32 100 450 int scalar() { constexpr int a = { f(100) }; return a; } 451 452 // CHECK: define {{.*}} @_ZN12LocalVarInit3aggEv 453 // CHECK-NOT: call 454 // CHECK: ret i32 101 455 int agg() { constexpr Agg a = { f(101) }; return a.k; } 456 457 // CHECK: define {{.*}} @_ZN12LocalVarInit4ctorEv 458 // CHECK-NOT: call 459 // CHECK: ret i32 102 460 int ctor() { constexpr Ctor a = { f(102) }; return a.k; } 461 462 // CHECK: define {{.*}} @_ZN12LocalVarInit8mutable_Ev 463 // CHECK-NOT: call 464 // CHECK: call {{.*}}memcpy{{.*}} @_ZZN12LocalVarInit8mutable_EvE1a 465 // CHECK-NOT: call 466 // Can't fold return value due to 'mutable'. 467 // CHECK-NOT: ret i32 103 468 // CHECK: } 469 int mutable_() { constexpr Mutable a = { f(103) }; return a.k; } 470 } 471 472 namespace CrossFuncLabelDiff { 473 // Make sure we refuse to constant-fold the variable b. 474 constexpr long a(bool x) { return x ? 0 : (long)&&lbl + (0 && ({lbl: 0;})); } 475 void test() { static long b = (long)&&lbl - a(false); lbl: return; } 476 // CHECK: sub nsw i64 ptrtoint (i8* blockaddress(@_ZN18CrossFuncLabelDiff4testEv, {{.*}}) to i64), 477 // CHECK: store i64 {{.*}}, i64* @_ZZN18CrossFuncLabelDiff4testEvE1b, align 8 478 } 479 480 // PR12012 481 namespace VirtualBase { 482 struct B {}; 483 struct D : virtual B {}; 484 D d; 485 // CHECK: call {{.*}}@_ZN11VirtualBase1DC1Ev 486 487 template<typename T> struct X : T { 488 constexpr X() : T() {} 489 }; 490 X<D> x; 491 // CHECK: call {{.*}}@_ZN11VirtualBase1XINS_1DEEC1Ev 492 } 493 494 // PR12145 495 namespace Unreferenced { 496 int n; 497 constexpr int *p = &n; 498 // We must not emit a load of 'p' here, since it's not odr-used. 499 int q = *p; 500 // CHECK-NOT: _ZN12Unreferenced1pE 501 // CHECK: = load i32, i32* @_ZN12Unreferenced1nE 502 // CHECK-NEXT: store i32 {{.*}}, i32* @_ZN12Unreferenced1qE 503 // CHECK-NOT: _ZN12Unreferenced1pE 504 505 // Technically, we are not required to substitute variables of reference types 506 // initialized by constant expressions, because the special case for odr-use 507 // of variables in [basic.def.odr]p2 only applies to objects. But we do so 508 // anyway. 509 510 constexpr int &r = n; 511 // CHECK-NOT: _ZN12Unreferenced1rE 512 int s = r; 513 514 const int t = 1; 515 const int &rt = t; 516 int f(int); 517 int u = f(rt); 518 // CHECK: call i32 @_ZN12Unreferenced1fEi(i32 1) 519 } 520 521 namespace InitFromConst { 522 template<typename T> void consume(T); 523 524 const bool b = true; 525 const int n = 5; 526 constexpr double d = 4.3; 527 528 struct S { int n = 7; S *p = 0; }; 529 constexpr S s = S(); 530 const S &r = s; 531 constexpr const S *p = &r; 532 constexpr int S::*mp = &S::n; 533 constexpr int a[3] = { 1, 4, 9 }; 534 535 void test() { 536 // CHECK: call void @_ZN13InitFromConst7consumeIbEEvT_(i1 zeroext true) 537 consume(b); 538 539 // CHECK: call void @_ZN13InitFromConst7consumeIiEEvT_(i32 5) 540 consume(n); 541 542 // CHECK: call void @_ZN13InitFromConst7consumeIdEEvT_(double 4.300000e+00) 543 consume(d); 544 545 // CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* dereferenceable({{[0-9]+}}) @_ZN13InitFromConstL1sE) 546 consume<const S&>(s); 547 548 // CHECK: call void @_ZN13InitFromConst7consumeIRKNS_1SEEEvT_(%"struct.InitFromConst::S"* dereferenceable({{[0-9]+}}) @_ZN13InitFromConstL1sE) 549 consume<const S&>(r); 550 551 // CHECK: call void @_ZN13InitFromConst7consumeIPKNS_1SEEEvT_(%"struct.InitFromConst::S"* @_ZN13InitFromConstL1sE) 552 consume(p); 553 554 // CHECK: call void @_ZN13InitFromConst7consumeIMNS_1SEiEEvT_(i64 0) 555 consume(mp); 556 557 // CHECK: call void @_ZN13InitFromConst7consumeIPKiEEvT_(i32* getelementptr inbounds ([3 x i32], [3 x i32]* @_ZN13InitFromConstL1aE, i32 0, i32 0)) 558 consume(a); 559 } 560 } 561 562 namespace Null { 563 decltype(nullptr) null(); 564 // CHECK: call {{.*}} @_ZN4Null4nullEv( 565 int *p = null(); 566 struct S {}; 567 // CHECK: call {{.*}} @_ZN4Null4nullEv( 568 int S::*q = null(); 569 } 570 571 namespace InlineStaticConstRef { 572 inline const int &fun() { 573 static const int &i = 10; 574 return i; 575 // CHECK: ret i32* @_ZGRZN20InlineStaticConstRef3funEvE1i_ 576 } 577 const int &use = fun(); 578 } 579 580 namespace ClassTemplateWithStaticDataMember { 581 template <typename T> 582 struct S { 583 static const int &a; 584 }; 585 template <typename T> 586 const int &S<T>::a = 5; 587 const int &use = S<void>::a; 588 } 589 590 namespace ClassTemplateWithHiddenStaticDataMember { 591 template <typename T> 592 struct S { 593 __attribute__((visibility("hidden"))) static const int &a; 594 }; 595 template <typename T> 596 const int &S<T>::a = 5; 597 const int &use = S<void>::a; 598 } 599 600 namespace ClassWithStaticConstexprDataMember { 601 struct X { 602 static constexpr const char &p = 'c'; 603 }; 604 605 // CHECK: @_ZGRN34ClassWithStaticConstexprDataMember1X1pE_ 606 const char *f() { return &X::p; } 607 } 608 609 // VirtualMembers::TemplateClass::templateMethod() must be defined in this TU, 610 // not just declared. 611 // CHECK: define linkonce_odr void @_ZN14VirtualMembers13TemplateClassIiE14templateMethodEv(%"struct.VirtualMembers::TemplateClass"* %this) 612
